MD5 加密

final char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',

'a', 'b', 'c', 'd', 'e', 'f' };

try {

byte[] strTemp = passWord.getBytes();

MessageDigest mdTemp = MessageDigest.getInstance("MD5");

mdTemp.update(strTemp);

byte[] md = mdTemp.digest();

int j = md.length;

char str[] = new char[j * 2];

int k = 0;

for (int i = 0; i < j; i++) {

byte byte0 = md[i];

str[k++] = hexDigits[byte0 >>> 4 & 0xf];

str[k++] = hexDigits[byte0 & 0xf];

}

md5Password=new String(str); // 之前改为str.toString(); 出现每次加密都不一样情况，array.tostring（）是将字符数组改为字符串数组

} catch (Exception e) {

System.out.println("md5加密异常");

}